Cyclic ketonic compounds and process of preparing them



Patented May 20, 1930 UNITED STATES HEINRICH GREUNE, OF HOOHST-ON-THE-MAIN, GERMANY, ASSIGNOR 'IO GENERAL' ANILINE WORKS, INC., OF NEW YORK,

PATENT rice.

N. Y., A CORPORATION OF DELAWARE CYCLIC KETONIC COMBOUNDS AND BROCESS F PREPARING THEM No Drawing. Application filed. July 5, 1927, Serial No. 203,669, and in Germany July 8, 1926.

- My present invention relates to new cyclic ketonic compounds and to a process of prepar ng the'lsametrams-particularly 1t relates to compounds COII lLHlIlllIg 'thQ ato gro i My new compounds are obtainable for in-' stance by causing a compound'o'f the general formula;

Ri-CH--CO RP H-oo 0 wherein R and R represent a substituent of the group including hydrogen and halogen, to,react upon an aromatic hydrocarbon having an unsubstituted peri-position, at a tem- 5 perature of about C. to about ordinary temperature, in the presence of an acid condensing agent, as for; instance aluminum chloride and a solvent such as nitrobcnzene and fusing the intermediate product thus obtained together with aluminum chloride or sodium-aluminum chloride for a short time, as for instance for about minutes.

This process probably takes place according to the following equation in which as an 35 example acenaphthene hasbeen chosen as the aromatic hydrocarbon:

(Intermediate compound) Instead of carrying out my process in two stages, as describedv above, I can effect the iformation of my new cyclic ketonic compounds in one stage by changing the reaction conditions so as to effect a stronger condensing action. The aromatic hydrocarbon havwherein R and R represent the same as above, in the presence of an acid'condensing agent, such as aluminum chloride, to a temperature of for instance 120 to 140 C.

My new compounds are intended to be used as parent compounds for the manufacture of dyestuffs.

In U. S. Patent No. 1,7 02,002 dated February 12, 1929, I have disclosed that condensa-v tion products showing the properties of cyclic ketones are obtainable by causing maleicanhydride to react with an aromatic hydrocarbon having an unsubstituted peri-position. I wish it tobe understood that the compounds obtainable according to the process described in the present application are different from those described in my said copending application. The latter, for instance, show an intense fluorescence, whereas the new com pounds of my present application possess in, for instance, concentrated sulfuric acid only a slight fluorescence The following examples illustrate the invention, the parts being by weight z (1) Into 400 parts of molten sodium-. aluminium chloride is introduced by portions, at a temperature of about 120 C. to 140 0., a powdered mixture of 30.8 parts of acen aphthene and 22 parts of succinic anhydride, and the melt is maintained at this temperature until the formation of the cyclic ketone is complete. After having decomposed the melt with much water the residue is filtered by suction and well washed firstwith hot dilute hydrochloric acid and then with hot water. In order to purify it, it is extracted with dilute sodium carbonate solution; thus the cyclic-ketone is obtained; whenrecrystallized from alcohol it forms almost colorless needles melting at 180? C. and-dis.- solving in concentrated sulfuric acid to a yellow solution having a slight greenish fluorescence.

(2) Into a solution of 185 parts of acenaphthene and 132 parts of succinic anhydride in 1800 parts of anhydrous nitrobenzene are in-.

troduced by degrees at ordinary temperature 360 parts of finely powdered aluminium chlo- ISO ride. After the ixture has been stirred at ordinary temperature for 24 hours, it is poured into i e water, the aqueous layer is separated, a d the nitrobenzene solutionis' well shaken first with dilute hydrochloric acid and then with water, and the nitrobenzene is finally distilled by means of steam. The

' residue remaining afterthe distillation is dissolved in sodiumcarbonate solution and again precipitated by means of hydrochloric acid so as to obtain the product in a pure state. The product is a carboxylic' acid crystallizing from dilute alcohol in the form of colorless laminae melting at 206 C. It dissolves in concentrated sulfuric acid to an orange-yellow solution. By melting the acid for a short time at all raised temperature together with aluminium chloride or sodiumaluminium chloride and working up in the usual manner the melt so produced; there is obtained, after recrystallization from alcohol of the residue insoluble in sodium carbonate solution, the new cyclic ketone of melting point 180 C. described in Example 1.

(3) Intoa solutionof 128 parts of naphthalene and 110 parts of succinic anhydride in 1000 parts of anhydrous nitrobenzene are introduced by portions at a temperature below 10 C. 2&0 parts of aluminium chloride and the mixture is stirred at this temperature for 24 hours. After having decomposed the nitrobeznene solution with water and diluted hydrochloric acid, the nitrobenzene is distilled by means of steam, the residue remaining after the distillation is dissolved in.

sodium carbonate solution, the solution is filtered and from the filtrate the ketocarboxylic acid which has formed, is finally precipitated by means of dilute hydrochloric acid. By recrystallizing this acid from an organic solvent, as for instance alcohol, it can be isolated in the form of colorless needles melting at 432 C. By melting the acid thus purified for about 40 minutes at 150 C. to 160 C. together with four times its weight of aluminium chloride or sodium-aluminium chloride and working up in the usual manner,

the molten mass so produced, a cyclic ketone is obtained which, when recrystallized from dilute alcohol, melts at about 165 C. This cyclic ketone may, of course, also be prepared in a single operation by melting the two components under suitable conditions with, for

instance, sodiumaluminium chloride in a thracene, and instead of succinic anhydride a dicarboxylic anhydride derived from maleic anhydride by the addition of a molecule of chlorine, bromine, or hydrochloric acid, hy-

drobromic acid or the like.

In the following hydrocarbon having an unsubstituted periposition is understood to comprise also derivatives or substitution products thereof.

I claim 1. As. new products the compounds con- 'taining the atom-grouping: I

' m-on-co RF ---CH O 1 a I wherein R and R represent substituents of the group including hydrogen and halogen, and C1, C and C represent carbon atoms belonging to an aromatic nucleus.

2. As. new products the'compounds of the probable general formula:

wherein R; and R represent hydro en or halogen and the two Ys represent hydrogen onstand jointly for the group:

3. As a new product the compound of the probable formula:

CH -CO 0 CH-CH claims the term aromatic 4. Theprocess which comprises causing a compound of the general formula:

'. The process which comprises causing a compound of the general formula:

wherein X stands for hydrogen or a monovalent substituent and the two Ys stand for.

' hydrogen or jointly for the group: 7

(kHz-EH2 3 to react with a compound of the general .for-

Inula wherein R and R represent hydrogen or halat a raised temperature together with aluminium chloride. 8. The process which comprises causing a compound of the general formula:

' Y wherein X stands for hydrogen or a monov alent substituent and the two Ys stand for hydrogen or jointly for the group:

to react with a compound of the general formula:

- iu-on-co wherein R and R represent hydrogen or halogen, in the presence of aluminium chloride and nitrobenzene at a temperature of about 10 C. 'to about ordinary temperature and melting the intermediate product thus obtained at a raised temperaturetogether with V sodium-aluminium chloride.

In testimony WhereofI affix my signature.

HEINRICH GREUNE.

ogen, in the presence'of aluminum chloride and nitrobenzene at a temperature of about 10 C. to about ordinary temperature and heating. the intermediate product thus ob- 40 tained for about 40 minutes to a temperature of about 150-16 0 G. in the presence of aluminum chloride.

6'. The process which comprises introducing into a solution of about 185 parts of acenaphthene and about 132 parts of succinic anhydride in about 1800 parts ofanhydrous nitrobenzene at room temperature about 360 parts of finely powdered aluminum chloride, stirring the mixture at ordinary temperature p for about '24 hours and melting the reaction product for a short time at a raised temperature together with aluminum chloride.

7. The process which comprises causing a compoundof the general formula:

m-on-oo HOO v R:- r I wherein R and R represent a substituent 'of -the group, including hydrogen and halogen,

to act uponan aromatic hydrocarbon having an unsubstituted peri-position, in the presence of an acid condensing agent and a solvent ata temperature of about 10 C. to about ordinary temperature and melting the interme- 65 diate product thus obtained for a short time CERTKFICATE or cornrenon.

Patent No. 1,7591% v I Granted May 20, 11930, to-

'nrmnion'euilr.

It. is hereby certified that error-appears in the printed specification oi the above numbered patent requiring correctionas follows: Page 2, line 61, tor "432 6" read "132 C"; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ut'ticei Signed and sealed this 22nd day of hziy, A; D. 1930.

Win. A. itinnzrn, 7 (Seal) Acting Commissioner oi Futente.

Certificate of Correction o Patent No. 1,759,111. I i I Granted May 20, 1930, to

' HEINRICH GREUNE Itis hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows:

Pagel, between'lines 37 and 47, strike out the formula for the intermediate com- 7 pound and insert instead HgC-CHz and that-the said Letters Patent should be read With this correction therein that the same may conform to the record of the case in the Patent Offiee. Y

- Signed and sealed this18th day of November, A. D. 1930.

[SEAL] l 7 WM. A. KINNAN, Acting Commissioner of Patents. 

